St. Astier Natural Hydraulic Lime

Natural Hydraulic Lime (NHL) has been produced in Saint Astier since 30 BC and produced on an industrial scale since 1851. This time-honored product is enjoying a modern comeback due to its performance and beauty. Not only is natural hydraulic lime an important material in historical preservation and restoration of many buildings worldwide, St. Astier Natural Hydraulic Lime is also the safest and most natural green building product in the construction industry today.

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Recommended Workshops

Andrew Morrison, from has a continuing series of workshops on how to build straw bale homes with a natural hydraulic lime exterior. The next opening is September 21-27, 2015 in Lincoln, Nebraska. For all workshop information, please visit is hosting a workshop called Color-Simulating Lime Mortars for Historic Building Repointing using the "Mortar Kit". The workshop will be held on June 12, 2015 near Allentown, Pennsylvania. Please visit for more information.

Please visit our workshop page for additional information on courses or workshops.